"Let's look at Call of Duty," Iwiński told Eurogamer at a press conference in Warsaw, Poland. "We are frequently checking the torrent sites before making our decisions. The game is out a few days and you have 100,000 people downloading it simultaneously. So it doesn't work.

And gives this as proof why a boxed version with lots of goodies but without DRM does work:

The breakthrough came when CD Projekt released RPG classic Baldur's Gate as Polish publisher. It included a D&D book, five CDs (pirates were charging per CD), a map with a seal, a music CD and more.

Baldur's Gate sold 18,000 copies, up from the 3000 average. "Nobody wanted to believe us, including Virgin Interplay," Iwiński said.